Dr. Lin graduated from the Chung Shan Med And Dental Coll, Taiching, Taiwan in 1976. He works in Mountain View, CA and specializes in Pediatrics and Neonatal-Perinatal Medicine. Dr. Lin is affiliated with El Camino Hospital and OConnor Hospital.
- Sunnyvale CA, US Wen Lin - Andover MA, US Suresh Palguna Krishnan - Fremont CA, US SelvaKumar Sivaraj - Sunnyvale CA, US Kumuthini Ratnasingham - Saratoga CA, US
International Classification:
H04L 12/721 H04L 12/713 H04L 12/741 H04L 12/46
Abstract:
A plurality of switches may be arranged according to a spine and leaf topology in which each spine switch is connected to all leaf switches. A leaf switch includes a memory configured to store a plurality of policies, each of the plurality of policies being associated with a respective source identifier value and a respective destination address; a network interface communicatively coupled to one of the spine switches; and a processor implemented in circuitry and configured to: receive a packet from the spine switch via the network interface, the packet being encapsulated with a Virtual Extensible Local Area Network (VXLAN) header; extract a source identifier value from the VXLAN header; determine a destination address for the packet; determine a policy of the plurality of policies to apply to the packet according to the source identifier value and the destination address; and apply the policy to the packet.
Avoiding Loops By Preventing Further Fast Reroute (Frr) After An Earlier Frr
In some cases, once Fast Reroute (FRR) has taken place (e.g., for MPLS protection), a further FRR is undesirable, and even detrimental. A mechanism to prevent a further FRR, once such a further FRR is determined to be potentially harmful, is described.
Failure Handling For Active-Standby Redundancy In Evpn Data Center Interconnect
Techniques are described for avoiding traffic black-holing in a multi-homed Ethernet virtual private networks (EVPNs) in which a customer device (CE) is multi-homed to a plurality of multi-homing provider edge devices (PEs) via respective links of an Ethernet segment. An overlay network is created over the Ethernet segment, and the multi-homing PEs of the EVPN are configured with a common anycast IP address for respective virtual network interfaces. Upon election as active designated forwarder (DF) for the EVPN, the DF PE of the multi-homing PEs advertises toward the customer network an IGP metric for the anycast IP address that is lower than the IGP metric(s) advertised by any of the non-DF standby PE routers segment to direct the CE to forward network packets from the customer network to the DF PE over the respective link of the Ethernet segment.
Aliasing Behavior For Traffic To Multihomed Sites In Ethernet Virtual Private Network (Evpn) Networks
For use in an Ethernet Virtual Private Network (EVPN) in which a site including at least one MAC-addressable device is multihomed, via a customer edge device (CE), to at least two provider edge devices (PE and PE), the potential problem of one of the at least two provider edge devices (PE) dropping or flooding packets designed for a MAC-addressable device of the multihomed site is solved by controlling advertisements of an auto-discovery per EVPN instance (A-D/EVI) route (or an auto-discovery per Ethernet segment identifier (A-D/ESI) route) to a remote provider edge device (PE), belonging to the EVPN but not directly connected with the CE. Such advertisements may be controlled by: (a) determining, by PE, whether or not a MAC-learning condition is met; and (b) responsive to a determination that the MAC-learning condition is met, advertising, by PE, an A-D/EVI route (or an A-D/ESI route) to the remote provider edge device (PE), and otherwise, responsive to a determination that the MAC-learning condition is not met, suppressing, by PE, an A-D/EVI route advertisement (or an A-D/ESI route advertisement).
Aliasing Behavior For Traffic To Multihomed Sites In Ethernet Virtual Private Network (Evpn) Networks
For use in an Ethernet Virtual Private Network (EVPN) in which a site including at least one MAC-addressable device is multihomed, via a customer edge device (CE), to at least two provider edge devices (PE and PE), the potential problem of one of the at least two provider edge devices (PE) dropping or flooding packets designed for a MAC-addressable device of the multihomed site is solved by controlling advertisements of an auto-discovery per EVPN instance (A-D/EVI) route (or an auto-discovery per Ethernet segment identifier (A-D/ESI) route) to a remote provider edge device (PE), belonging to the EVPN but not directly connected with the CE. Such advertisements may be controlled by: (a) determining, by PE whether or not a MAC-learning condition is met; and (b) responsive to a determination that the MAC-learning condition is met, advertising, by PE an A-D/EVI route (or an A-D/ESI route) to the remote provider edge device (PE), and otherwise, responsive to a determination that the MAC-learning condition is not met, suppressing, by PE an A-D/EVI route advertisement (or an A-D/ESI route advertisement).
Assisted Replication With Multi-Homing And Local Bias
- Sunnyvale CA, US Wen LIN - Andover MA, US Praful LALCHANDANI - Fremont CA, US Aldrin ISAAC - San Jose CA, US Deepti J. CHANDRA - Sunnyvale CA, US Vishal GARG - Fremont CA, US
A device may receive, from a provider edge device, a packet to be provided to one or more other provider edge devices. Some of the one or more other provider edge devices may be multi-homed with a same customer edge device as the provider edge device. The device may configure a source IP address of the packet based on a capability of an assisted replicator device after receiving the packet. The capability may relate to whether the assisted replicator device is capable of retaining the source IP address of the packet as received from the provider edge device. The device may provide the packet to at least some provider edge devices, of the one or more other provider edge devices, after configuring the source IP address of the packet.
Multicast Load Balancing In Multihoming Evpn Networks
- Sunnyvale CA, US Wen Lin - Andover MA, US Robert W. Kebler - Newburyport MA, US Princy T. Elizabeth - Bangalore, IN Kapil Arora - Bangalore, IN
International Classification:
H04L 12/801 H04L 29/06 G06F 9/54
Abstract:
In general, techniques are described for load-balancing responsibility for forwarding of multicast traffic into an active-active Ethernet segment between two or more multi-homed provider edge (PE) routers in an Ethernet Virtual Private Network (EVPN). In one example, a PE router may receive an Internet Group Management Protocol (IGMP) join report for a multicast group. The PE router may send join synch routes used to synchronize the join report for the multicast group across the Ethernet segment. The PE router may deterministically determine whether the PE router is configured to be an elected multicast forwarder for one of a plurality of multicast groups. If the PE router is elected a multicast forwarder, the PE router may configure a forwarding state of the PE router to ignore a designated forwarder calculation and to forward the multicast traffic into the Ethernet segment regardless of whether the PE router is a designated forwarder.
Protocol Independent Multicast Sparse Mode (Pim-Sm) Support For Data Center Interconnect
- Sunnyvale CA, US Zhaohui Zhang - Westford MA, US Wen Lin - Andover MA, US Tapraj Singh - San Ramon CA, US
International Classification:
H04L 12/18 H04L 12/761 H04L 12/46
Abstract:
Techniques are described for utilizing Protocol Independent Multicast Sparse Mode (PIM-SM) to transport BUM (broadcast, unknown unicast, and multicast) traffic in a Virtual Extensible LAN (VXLAN) underlay of a data center, where the BUM traffic is received on active-active, multi-homed Ethernet virtual private network (EVPN) interconnects between multiple physical data centers. For example, the techniques may readily be applied to support usage of PIM-SM where provider edge (PE) routers of the EVPN operate as gateways between the EVPN and the VXLAN spanning the data center interconnect.
Name / Title
Company / Classification
Phones & Addresses
Wen Lin Account Manager
Access Worldwide Communications, Inc. Management Consulting Services
1820 Fort Myer Dr, Arlington, VA 22209
Wen Lin Director
ASIAN FUSION, INC Eating Place
48 Whiting St, Hingham, MA 02043 39 Birch St, Quincy, MA 02171
Wen Jian Lin Clerk
TAISHAN FAMILY ASSOCIATION, INC
9 Hudson St, Boston, MA 02111 35 Fidelis Way APT 908, Brighton, MA 02135
Wen Lin Account Manager
Access Worldwide Communications, Inc.
1820 Ft Myer Dr, Arlington, VA 22209 5713847400, 7034568642
Wen Jui Lin
Wen Lin DMD Dentists
463 Worcester Rd, Framingham, MA 01701 5088207792
Wen Bin Lin
CHINA STAR WENBIN INC
Wen Yuan Lin
CHINA WOK CHINESE RESTAURANT INC
Wen Jian Lin Treasurer
JIAN HUNG, INC Nonclassifiable Establishments
19 Edinboro St, Boston, MA 02111 35 Fidelis Way APT 908, Brighton, MA 02135